FastAPI Release Notes

Features

✨ Add support for @app.vibe(). PR #15280 by @tiangolo.
New docs: Vibe Coding.

Docs

✏️ Fix typo for client_secret in OAuth2 form docstrings. PR #14946 by @bysiber.

Internal

👥 Update FastAPI People - Experts. PR #15279 by @tiangolo.
⬆ Bump orjson from 3.11.7 to 3.11.8. PR #15276 by @dependabot[bot].
⬆ Bump ruff from 0.15.0 to 0.15.8. PR #15277 by @dependabot[bot].
👥 Update FastAPI GitHub topic repositories. PR #15274 by @tiangolo.
⬆ Bump fastmcp from 2.14.5 to 3.2.0. PR #15267 by @dependabot[bot].
👥 Update FastAPI People - Contributors and Translators. PR #15270 by @tiangolo.
⬆ Bump requests from 2.32.5 to 2.33.0. PR #15228 by @dependabot[bot].
👷 Add ty check to lint.sh. PR #15136 by @svlandeg.

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Upgrades

⬆️ Increase lower bound to pydantic >=2.9.0. and fix the test suite. PR #15139 by @svlandeg.

Docs

📝 Add missing last release notes dates. PR #15202 by @tiangolo.

📝 Update docs for contributors and team members regarding translation PRs. PR #15200 by @YuriiMotov.

💄 Fix code blocks in reference docs overflowing table width. PR #15094 by @YuriiMotov.

📝 Fix duplicated words in docstrings. PR #15116 by @AhsanSheraz.

📝 Add docs for pyproject.toml with entrypoint. PR #15075 by @tiangolo.

📝 Update links in docs to no longer use the classes external-link and internal-link. PR #15061 by @tiangolo.

🔨 Add JS and CSS handling for automatic target=_blank for links in docs. PR #15063 by @tiangolo.

💄 Update styles for internal and external links in new tab. PR #15058 by @tiangolo.

📝 Add documentation for the FastAPI VS Code extension. PR #15008 by @savannahostrowski.

📝 Fix doctrings for max_digits and decimal_places. PR #14944 by @YuriiMotov.

📝 Add dates to release notes. PR #15001 by @YuriiMotov.

Translations

🌐 Update translations for zh (update-outdated). PR #15177 by @tiangolo.

🌐 Update translations for zh-hant (update-outdated). PR #15178 by @tiangolo.

🌐 Update translations for zh-hant (add-missing). PR #15176 by @tiangolo.

🌐 Update translations for zh (add-missing). PR #15175 by @tiangolo.

🌐 Update translations for ja (update-outdated). PR #15171 by @tiangolo.

🌐 Update translations for ko (update-outdated). PR #15170 by @tiangolo.

🌐 Update translations for tr (update-outdated). PR #15172 by @tiangolo.

🌐 Update translations for ko (add-missing). PR #15168 by @tiangolo.

🌐 Update translations for ja (add-missing). PR #15167 by @tiangolo.

🌐 Update translations for tr (add-missing). PR #15169 by @tiangolo.

🌐 Update translations for fr (update-outdated). PR #15165 by @tiangolo.

🌐 Update translations for fr (add-missing). PR #15163 by @tiangolo.

🌐 Update translations for uk (update-outdated). PR #15160 by @tiangolo.

🌐 Update translations for uk (add-missing). PR #15158 by @tiangolo.

🌐 Update translations for pt (add-missing). PR #15157 by @tiangolo.

🌐 Update translations for pt (update-outdated). PR #15159 by @tiangolo.

🌐 Update translations for es (update-outdated). PR #15155 by @tiangolo.

🌐 Update translations for es (add-missing). PR #15154 by @tiangolo.

🌐 Update translations for de (update-outdated). PR #15156 by @tiangolo.

🌐 Update translations for ru (update-and-add). PR #15152 by @tiangolo.

🌐 Update translations for de (add-missing). PR #15153 by @tiangolo.

Internal

🔨 Exclude spam comments from statistics in scripts/people.py. PR #15088 by @YuriiMotov.

⬆ Bump authlib from 1.6.7 to 1.6.9. PR #15128 by @dependabot[bot].

⬆ Bump pyasn1 from 0.6.2 to 0.6.3. PR #15143 by @dependabot[bot].

⬆ Bump ujson from 5.11.0 to 5.12.0. PR #15150 by @dependabot[bot].

🔨 Tweak translation workflow and translation fixer tool. PR #15166 by @YuriiMotov.

🔨 Fix commit_in_place passed via env variable in translate.yml workflow. PR #15151 by @YuriiMotov.

🔨 Update translation general prompt to enforce link style in translation matches the original link style. PR #15148 by @YuriiMotov.

👷 Re-enable translation workflow run by cron in CI (twice a month). PR #15145 by @YuriiMotov.

👷 Add ty to precommit. PR #15091 by @svlandeg.

⬆ Bump dorny/paths-filter from 3 to 4. PR #15106 by @dependabot[bot].

⬆ Bump cairosvg from 2.8.2 to 2.9.0. PR #15108 by @dependabot[bot].

⬆ Bump pyjwt from 2.11.0 to 2.12.0. PR #15110 by @dependabot[bot].

⬆ Bump black from 26.1.0 to 26.3.1. PR #15100 by @dependabot[bot].

🔨 Update script to autofix permalinks to account for headers with Markdown links. PR #15062 by @tiangolo.

📌 Pin Click for MkDocs live reload. PR #15057 by @tiangolo.

⬆ Bump werkzeug from 3.1.5 to 3.1.6. PR #14948 by @dependabot[bot].

⬆ Bump pydantic-ai from 1.62.0 to 1.63.0. PR #15035 by @dependabot[bot].

⬆ Bump pytest-codspeed from 4.2.0 to 4.3.0. PR #15034 by @dependabot[bot].

⬆ Bump strawberry-graphql from 0.291.2 to 0.307.1. PR #15033 by @dependabot[bot].

⬆ Bump typer from 0.21.1 to 0.24.1. PR #15032 by @dependabot[bot].

⬆ Bump actions/download-artifact from 7 to 8. PR #15020 by @dependabot[bot].

⬆ Bump actions/upload-artifact from 6 to 7. PR #15019 by @dependabot[bot].

Original source Report a problem

Fixes

• 🐛 Fix, avoid yield from a TaskGroup, only as an async context manager, closed in the request async exit stack. PR #15038 by @tiangolo.

Docs

• ✏️ Fix typo in docs/en/docs/_llm-test.md. PR #15007 by @adityagiri3600.
• 📝 Update Skill, optimize context, trim and refactor into references. PR #15031 by @tiangolo.

Internal

• 👥 Update FastAPI People - Experts. PR #15037 by @tiangolo.
• 👥 Update FastAPI People - Contributors and Translators. PR #15029 by @tiangolo.
• 👥 Update FastAPI GitHub topic repositories. PR #15036 by @tiangolo.

Original source Report a problem

Features

• ✨ Add support for streaming JSON Lines and binary data with yield. PR #15022 by @tiangolo.
• This also upgrades Starlette from >0.40.0 to >0.46.0, as it's needed to properly unrwap and re-raise exceptions from exception groups.
• New docs: Stream JSON Lines.
• And new docs: Stream Data.

Docs

• 📝 Update Library Agent Skill with streaming responses. PR #15024 by @tiangolo.
• 📝 Update docs for responses and new stream with yield. PR #15023 by @tiangolo.
• 📝 Add await in StreamingResponse code example to allow cancellation. PR #14681 by @casperdcl.
• 📝 Rename docs_src/websockets to docs_src/websockets_ to avoid import errors. PR #14979 by @YuriiMotov.

Internal

• 🔨 Run tests with pytest-xdist and pytest-cov. PR #14992 by @YuriiMotov.

Original source Report a problem

Breaking Changes

• 🔒️ Add strict_content_type checking for JSON requests. PR #14978 by @tiangolo.
  Now FastAPI checks, by default, that JSON requests have a Content-Type header with a valid JSON value, like application/json, and rejects requests that don't.
  If the clients for your app don't send a valid Content-Type header you can disable this with strict_content_type=False.
  Check the new docs: Strict Content-Type Checking.

Internal

• ⬆ Bump flask from 3.1.2 to 3.1.3. PR #14949 by @dependabot[bot].
• ⬆ Update all dependencies to use griffelib instead of griffe. PR #14973 by @svlandeg.
• 🔨 Fix FastAPI People workflow. PR #14951 by @YuriiMotov.
• 👷 Do not run codspeed with coverage as it's not tracked. PR #14966 by @tiangolo.
• 👷 Do not include benchmark tests in coverage to speed up coverage processing. PR #14965 by @tiangolo.

Original source Report a problem